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Hello all,

Could someone help me figure this out...

Does the motor control in a gas engine prevent the engine from overloading? Eg. when hitting the accelerator really hard in low rpms.

In the case of a diesel engine, another member pointed out to me that air flow is unrestricted, and the amount of diesel injected is based simply on power demand, thus resulting in lots of unused diesel coming out the other end. This seems like an unacceptable behaviour to me. I cycle through that black smoke every day... Does anyone know if the electronics try to prevent this in some way?

Generally, I would like to find out exactly what makes a diesel engine spit out black smoke? Simply too much accelerator? Overloaded engine? High rpms?

Thanks,

Wim

Not an expert, but a Google search says "too much fuel": http://www.peemac.sdnpk.org/resource/fert/tips5.html

i thought electronic throttle control would prevent too much gas with no power being developed (if one were to step on the pedal at such low rpms + high gear) so either I would suggest a lighter foot at low rpms then increase slightly when rpms climb.

If you really need to hit it hard, just downshift ;)

Thanks Phil and rhwinger, you both confirm my idea that in order to drive clean with a diesel engine, you really need to be gentle with the accelerator. I needed this info for a clean driving campaign, see my other posts.

The way I want to convince people is: see, that's where the filthy black smoke comes from! (I estimate about 85% diesel engines in Belgium.)

Cheers,

Wim